Merge pull request #2606 from tvolk131/qr_code_fixed_size

feat: set total size of QRCode

widget/src/qr_code.rs

@@ -26,15 +26,15 @@ use crate::core::mouse;
 use crate::core::renderer::{self, Renderer as _};
 use crate::core::widget::tree::{self, Tree};
 use crate::core::{
-    Color, Element, Layout, Length, Point, Rectangle, Size, Theme, Vector,
-    Widget,
+    Color, Element, Layout, Length, Pixels, Point, Rectangle, Size, Theme,
+    Vector, Widget,
 };
 use crate::Renderer;
 
 use std::cell::RefCell;
 use thiserror::Error;
 
-const DEFAULT_CELL_SIZE: u16 = 4;
+const DEFAULT_CELL_SIZE: f32 = 4.0;
 const QUIET_ZONE: usize = 2;
 
 /// A type of matrix barcode consisting of squares arranged in a grid which
@@ -66,7 +66,7 @@ where
     Theme: Catalog,
 {
     data: &'a Data,
-    cell_size: u16,
+    cell_size: f32,
     class: Theme::Class<'a>,
 }
 
@@ -84,8 +84,16 @@ where
     }
 
     /// Sets the size of the squares of the grid cell of the [`QRCode`].
-    pub fn cell_size(mut self, cell_size: u16) -> Self {
-        self.cell_size = cell_size;
+    pub fn cell_size(mut self, cell_size: impl Into<Pixels>) -> Self {
+        self.cell_size = cell_size.into().0;
+        self
+    }
+
+    /// Sets the size of the entire [`QRCode`].
+    pub fn total_size(mut self, total_size: impl Into<Pixels>) -> Self {
+        self.cell_size =
+            total_size.into().0 / (self.data.width + 2 * QUIET_ZONE) as f32;
+
         self
     }
 
@@ -133,8 +141,8 @@ where
         _renderer: &Renderer,
         _limits: &layout::Limits,
     ) -> layout::Node {
-        let side_length = (self.data.width + 2 * QUIET_ZONE) as f32
-            * f32::from(self.cell_size);
+        let side_length =
+            (self.data.width + 2 * QUIET_ZONE) as f32 * self.cell_size;
 
         layout::Node::new(Size::new(side_length, side_length))
     }